测井技术2023，Vol.47Issue(6)：695-700,6.DOI:10.16489/j.issn.1004-1338.2023.06.007
超临界CO2分层注入井气嘴压力损失研究
Study on Pressure Loss of Gas Nozzle in Supercritical CO2 Stratified Injection Wells
摘要
Abstract
The CO2 flooding layer by layer gas injection process can achieve balanced injection of CO2 into each layer and effectively reducing the risk of CO2 gas channeling.Reasonable allocation of flow rates in each layer is the key to on-site testing of CO2 flooding layer by layer gas injection.A pressure loss calculation model for CO2 is established through the gas nozzle under supercritical conditions in the CO2 drive stratified gas injection process,and the pressure loss diagram of CO2 fluid is determined through the gas nozzle under supercritical conditions.We analyze the impact of wellbore temperature and formation pressure on CO2 flooding pressure loss,facilitating on-site calibration of the gas nozzle pressure loss chart.At the same time,a series of nozzle diameters are designed to ensure the selection of appropriate caliber gas nozzles in on-site stratified flow allocation.The research results of the on-site test of CO2 flooding gas injection wells in a oilfield shows that the error between the actual injection flow rate and the target injection flow rate after selecting a suitable gas nozzle is about 1%.The method effectively improves the accuracy of CO2 flooding stratified flow rate allocation.The method proposed in this article effectively reduces the process flow and cost of on-site processes,providing a basis and guidance for the selection of gas nozzles for CO2 flooding stratified gas injection and on-site stratified flow rate adjustment.关键词
超临界CO2驱/分层注气工艺/气嘴压力损失/气嘴口径系列Key words
supercritical CO2 flooding/stratified gas injection process/gas nozzle pressure loss/gas nozzle caliber sequence引用本文复制引用
崔知栩,刘兴斌,李凌娟..超临界CO2分层注入井气嘴压力损失研究[J].测井技术,2023,47(6):695-700,6.基金项目
国家自然科学基金"网络模型的智能分层注水井压力脉冲数据传输方法"(52174021) （52174021）
